package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    ShoppingCartMapper shoppingCartMapper;
    @Autowired
    DishMapper dishMapper;
    @Autowired
    SetmealMapper setmealMapper;

    @Override
    @Transactional
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size() > 0) {
            ShoppingCart shoppingCart1 = list.get(0);
            shoppingCart1.setNumber(shoppingCart1.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart1);
        }else {
              Long dishId = shoppingCart.getDishId();
              if(dishId != null) {
                  //添加进来的是菜品
                  Dish dish = dishMapper.getById(dishId);
                  shoppingCart.setName(dish.getName());
                  shoppingCart.setImage(dish.getImage());
                  shoppingCart.setAmount(dish.getPrice());
                  shoppingCart.setNumber(1);
                  shoppingCart.setCreateTime(LocalDateTime.now());

              }else {
                  //添加进来的是套餐
                  Long setmealId = shoppingCartDTO.getSetmealId();

                  Setmeal setmeal = setmealMapper.getById(setmealId);

                  shoppingCart.setName(setmeal.getName());
                  shoppingCart.setImage(setmeal.getImage());
                  shoppingCart.setAmount(setmeal.getPrice());
                  shoppingCart.setNumber(1);
                  shoppingCart.setCreateTime(LocalDateTime.now());
              }
              shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> list(Long currentId) {
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(currentId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void clean(Long currentId) {
        shoppingCartMapper.clean(currentId);
    }

    @Override
    public void delete(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());

        ShoppingCart shoppingCart1 = shoppingCartMapper.list(shoppingCart).get(0);
        if (shoppingCart1.getNumber() > 1){
            shoppingCart1.setNumber(shoppingCart1.getNumber() - 1);
            shoppingCartMapper.updateNumberById(shoppingCart1);
        }else {
            shoppingCartMapper.deleteById(shoppingCart1);
        }
    }
}
